Pufferfish

Sometimes Luna likes to tease and make fun of her fellow fishy friends.

She doesn't really have to try that hard:

My fondest memory in relation to pufferfishes was many years ago when I was scuba diving with my sister and she saw a pufferfish swim by (I didn't) and she frantically tugged at me to come see and made these excited gestures with her hands. I didn't understand what she was trying to communicate since we both had our regulators on our mouths and were wearing dive masks. It was later when we returned to the surface and got back onto the boat that I asked and she explained that she had seen a pufferfish swim by her. But the way she tried to use her hands to show this was way funnier since she made it seem like she saw a fish swim by which then exploded.